<UserControl x:Class="System.Windows.Controls.Testing.DomainUpDownItemsInitialization"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:inputToolkit="clr-namespace:System.Windows.Controls;assembly=System.Windows.Controls.Input.Toolkit"
 
    xmlns:system="clr-namespace:System;assembly=mscorlib" 
    Width="400" Height="300">
    <Grid Background="White">

        <inputToolkit:DomainUpDown x:Name="dud" >
            <Rectangle />
            <system:String>Hi</system:String>
        </inputToolkit:DomainUpDown>
    </Grid>
</UserControl>
